Color and lightfastness with digital standards

Technical Properties

• Measuring Capability

  Color, Gloss, Fluorescence

Color Measurement

• Color Geometry

  d:8° (spin/spex)

• Sample Port

  12 mm

• Measuring Area

  8 mm

• Spectral Range Colorimetric

  400 - 700 nm, 10 nm resolution

• Spectral Range Fluorescence

  340 - 760 nm, 10 nm resolution

• Measurement Range

  0 - 170% reflectance

• Repeatability Color

  0.01 ΔE94 (10 consecutive measurements on white)

• Reproducibility Color

  0.1 ΔE94 (average of 12 BCRA II tiles)

• Color Systems

  CIELab/Ch, Lab(h), XYZ, Yxy

• Color Differences

  ΔE*; ΔE(h); ΔECMC; ΔE94; ΔE99; ΔE2000; E2000 PF; ΔE DIN6175-2019

• Color Indices

  YIE313, YID1925, WIE313, CIE, Berger, Color Strength, Opacity, Metamerism, Grayscale

• Illuminants

  A, C, D50, D55, D65, D75, F2, F6, F7, F8, F10, F11, UL30, CIE 015:2018 LED Illuminants

• Observer

  2°, 10°

• Fluorescent Indices

  ΔE Fl, ΔEzero

Gloss Measurement

• Repeatability Gloss 0-20

  ± 0,1 GU

• Repeatability Gloss 20-100

  ± 0,2 GU

• Reproducibility Gloss 0-20

  ± 0,5 GU

• Reproducibility Gloss 20-100

  ± 1,0 GU

• Gloss Geometry

  60°

• Gloss Aperture

  5 x 10 mm

• Measurement Range Gloss

  0 - 100 GU

General

• Memory

  4.000 Standards and 10.000 Samples

• Interface

  USB port

• Display

  3.5 " Color Touchscreen

• Languages

  English German French Italian Spanish Russian Japanese Chinese

• Power supply

  Internal rechargeable battery

• Power supply

  100 - 240 V, 50/60 Hz

• Battery

  7.2 V, 2350 mAh, 16.92 Wh

• Battery Capacity

  1200 readings

• Weight

  0.7 kg

• Weight

  1.5 lb

• Operating temperature

  10 - 40 °C

• Storing temperature

  0 - 60 °C

• Operating temperature

  50 - 104 °F

• Storing temperature

  32 - 140 °F

• Relative humidity

  Up to 85 % non-condensing at 35 °C (95 °F)

• Dimensions: L x W x H

  8.7 x 11 x 18.8 cm

• Dimensions: L x W x H

  3.4 x 4.3 x 7.4 in

Spectrophotometer
Docking station with built-in diagnosis standard
White calibration standard
Color and gloss test standard
Certificate
Software with 2 licensees for download:
smart-lab Color (7083) or smart-process Color (7084)
USB to connect docking station to PC (7077)
USB cable for data transfer (7078)
Stylus (7079), Protective cap (7076), hand strap
Manual, Carrying case
1-day training

The basic building blocks of color measurement

Visual color perception is influenced by our individual color preferences, which are dependent on personal factors (mood, age, gender etc.), environment (lighting, surrounding etc.) as well as our ability to communicate color and color differences. A color looks different in the department store (cool white fluorescent lighting) than at home (warm, incandescent lighting). In order to guarantee consistent color and appearance under all possible circumstances, it is essential to standardize light source, observer and understand the spectral remission data of the object. This information will be the basis for calculation of colorimetric data as it is used for color communication and color QC in production.

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Color Difference Equations for Solid Colors

It is now almost 100 years since, in 1931, the CIE Yxy chromaticity color space was defined by the “International Commission on Illumination (CIE)”. To overcome its limitations of not being uniform, the CIE recommended two alternate color spaces since then: CIELAB (or CIE 1976 L*a*b*) and CIELUV (or CIE L*u*v*). They are based on the opponent color theory of color vision, which says that two colors cannot be both green and red at the same time, nor blue and yellow at the same time. During the last years developments of new color difference equations and color spaces were carried out. Their goal was to improve the correlation between visual perception and instrumentally measured values. Additionally, they wanted to permit the use of a single number tolerance for all colors.

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Color Measurement of Fluorescent Colors – a CHALLENGE

The world around us is bright and colorful. Neon colors in particular have been back in trend for several years. The prerequisite for this is the use of fluorescent pigments in the paint, plastic and many other industries. Although these have been widely used for many years, the quality control of fluorescent material still remains a major challenge. The following article describes theoretical background of fluorescence, why a standard spectrophotometer is not suitable for the quality control of fluorescent material and what possibilities the new combination of spectrophotometer and fluorimeter offers - especially with regard to predicting the lightfastness of a material.

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